🚀 go-pugleaf

	I like to add a few words about some amazing features of
	BESM-6.

	Talking about how-to-turn-off-machine I forgot to say
	that BESM has a software feature to block power turnoff
	(I think it's a quite valuable idea, especially for Unix
	machines; what's about self-turning-on machines? ;-).

	Another piece of BESM's hardware is a drum printers ACPU-128
	(stands for Alphabetic-Numeric Printing Device, oh days of yore!)
	These printers have a funny control: each hammer can be moved
	by setting or clearing bits in the register. Interrupt per
	each rotating drum position generated. So, driver should catch
	interrupts and recalculate positions of hammers. As a result
	the best printer driver takes 12% of CPU per one device.
	Another feature of such printer control is *very* funny:
	if driver failed to handle interrupt at a time the line of garbage
	appeared. One can also calculate a loading of the machine by
	measuring distances between baseline and letters.

	Vadim Antonov
	DEMOS, Moscow, USSR
	(It is NOT a joke!)